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interface Beta {} class Alpha implements Beta { String testIt（） { return “Tested”； } } public class Main1 { static Beta getIt（） { return new Alpha（）； } public static void main（ String[] args ） { Beta b = getIt（）； System.out.println（ b.testIt（） ）； } } What is the result？（）
- A、 Tested
- B、 Compilation fails.
- C、 The code runs with no output.
- D、 An exception is thrown at runtime.
参考答案
更多 “ interface Beta {} class Alpha implements Beta { String testIt（） { return “Tested”； } } public class Main1 { static Beta getIt（） { return new Alpha（）； } public static void main（ String[] args ） { Beta b = getIt（）； System.out.println（ b.testIt（） ）； } } What is the result？（） A、 TestedB、 Compilation fails.C、 The code runs with no output.D、 An exception is thrown at runtime.” 相关考题
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Whichcommandshowsif an accesslistisassignedtoaninterface?()
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已知符号定义语句如下： ALPHA EQU 100 BETA EQU 25 GAMMA EQU 2 分别求下列各表达式的值。 （1）ALPHA*4GTBETA （2）ALPHAMODGAMMA＋BETA （3）（BETA/3）LE5 （4）ALPHAANDBETA （5）GAMMAXOR（BETAEQ25）
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Which command allows you to view interface usage details in real-time?（）A、user@host debug interface interface-nameB、user@host monitor usage interface-nameC、user@host monitor interface interface-nameD、user@host traceoptions interface interface-name
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A resource group， MY_APP， has the following configuration： Resource Group NameMY_APP Participating Node Name（s）Alpha Beta GammaStartup Policy Online On Home Node Only Fallover Policy Fallover To Next Priority Node In The List Fallback Policy Fallback To Higher Priority Node InThe List MY_APP is currently running on node Beta. MY_APP is then moved to node Gamma using C-SPOC.Nodes Alpha and Beta are shutdown and restarted. Node Alpha stabilizes approx 60 seconds before nodeBeta. What happens to the resource group， MY_APP， when nodes Alpha and Beta are restarted？（）A、It moves to BetaB、It stays on GammaC、It moves to AlphaD、It moves to Alpha， then to Beta
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10. interface Foo {} 11. class Alpha implements Foo {} 12. class Beta extends Alpha {} 13. class Delta extends Beta { 14. public static void main（ String[] args） { 15. Beta x = new Beta（）； 16. // insert code here 17. } 18. } Which code， inserted at line 16， will cause a java.lang.ClassCastException？（） A、 Alpha a = x；B、 Foo f= （Delta）x；C、 Foo f= （Alpha）x；D、 Beta b = （Beta）（Alpha）x；
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单选题Which command allows you to view interface usage details in real-time?（）A
user@host debug interface interface-nameB
user@host monitor usage interface-nameC
user@host monitor interface interface-nameD
user@host traceoptions interface interface-name
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单选题A resource group， MY_APP， has the following configuration： Resource Group NameMY_APP Participating Node Name（s）Alpha Beta GammaStartup Policy Online On Home Node Only Fallover Policy Fallover To Next Priority Node In The List Fallback Policy Fallback To Higher Priority Node InThe List MY_APP is currently running on node Beta. MY_APP is then moved to node Gamma using C-SPOC.Nodes Alpha and Beta are shutdown and restarted. Node Alpha stabilizes approx 60 seconds before nodeBeta. What happens to the resource group， MY_APP， when nodes Alpha and Beta are restarted？（）A
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单选题10. interface Foo {} 11. class Alpha implements Foo {} 12. class Beta extends Alpha {} 13. class Delta extends Beta { 14. public static void main（ String[] args） { 15. Beta x = new Beta（）； 16. // insert code here 17. } 18. } Which code， inserted at line 16， will cause a java.lang.ClassCastException？（）A
Alpha a = x；B
Foo f= （Delta）x；C
Foo f= （Alpha）x；D
Beta b = （Beta）（Alpha）x；
考题
单选题interface Beta {} class Alpha implements Beta { String testIt（） { return “Tested”； } } public class Main1 { static Beta getIt（） { return new Alpha（）； } public static void main（ String[] args ） { Beta b = getIt（）； System.out.println（ b.testIt（） ）； } } What is the result？（）A
TestedB
Compilation fails.C
The code runs with no output.D
An exception is thrown at runtime.
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多选题10. class Foo { 11. static void alpha（） { /* more code here */ } 12. void beta（） { /* more code here */ } 13. } Which two are true？（）AFoo.beta（） is a valid invocation of beta（）.BFoo.alpha（） is a valid invocation of alpha（）.CMethod beta（） can directly call method alpha（）.DMethod alpha（） can directly call method beta（）.
考题
单选题Which code， inserted at line 16， will cause a java.lang.ClassCastException？（）A
Alpha a=x；B
Foo f=（Delta）x；C
Foo f=（Alpha）x；D
Beta b=（Beta）（Alpha）x；
考题
单选题Given： Which code， inserted at line 16， will cause a java.lang.ClassCastException？（）A
Alpha a = x；B
Foo f = （Delta）x；C
Foo f = （Alpha）x；D
Beta b = （Beta）（Alpha）x；
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